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import LibMatchPS
_tailPS' x
= if _nullPS x then
error "_tailPS []"
else
_substrPS x 1 (_lengthPS x)
subst :: String
-> String
-> [Char]
-> String
-> String
subst rexp repl flags str
= _unpackPS (substPS (_packString rexp)
(_packString repl)
flags
(_packString str))
pickFirst :: String
-> String
-> String
pickFirst str substr
= let
str' = _packString str
in
case (findPS (_packString str) (_packString substr)) of
Nothing -> ""
Just x -> _unpackPS (_dropPS x str')
pickLast :: String
-> String
-> String
pickLast str substr
= let
str' = _packString str
in
case (rfindPS (_packString str) (_packString substr)) of
Nothing -> ""
Just x -> _unpackPS (_dropPS x str')
main
= getArgs >>= \ (pattern:replacement:stuff:xs) ->
let
flags
= case xs of
[] -> []
(x:xs) -> x
in
(case stuff of
(':':xs) ->
openFile xs ReadMode >>= \ hndl ->
hGetContents hndl
_ -> return stuff) >>= \ stuff' ->
putStr (subst pattern replacement flags stuff') >>
putStr "\n"
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